Packings - WAGNER PROSPRAY 20 Owner's Manual

ProSpray 20
12.3

PACKINGS

1. Remove inlet valve housing in accordance with the steps
in Chapter 12.2.
2. It is not necessary to remove the outlet valve.
3. Unscrew both cylinder head screws (Fig. 12, Item 1) from
the pump manifold (2) with a 3/8 inch hexagon socket
head wrench.
4. Slide the pump manifold (2) and piston (3) forward until
the piston is out of the T-slot (10) on the slider assembly
(5).
5. Push piston (3) downward out of the pump manifold (2).
6. Unscrew retainer nut (6) from the pump manifold (2) and
remove piston guide (7).
7. Remove upper packing (8) and lower packing (9) from the
pump manifold (2).
10
8. Clean pump manifold (2).
9. Lubricate upper packing (8) and lower packing (9) with
machine grease.
10. Insert upper packing (Fig. 13) with O-ring (1) and
protruding lip (2) downward.
11. Insert lower packing (Fig. 14) with the beveled edge (1)
12. Insert piston guide (Fig. 12, Item 7) into the retainer nut
13. Push installation tool (included with the replacement
5
14. Lubricate installation tool and piston (3) with machine
15. Guide piston (3) through the lower packings (9) into the
6
7
16. Remove installation tool from piston (3).
8
17. Carefully tighten retainer nut (6) with adjusting wrench.
18. Slide the top of the piston (3) into the T-slot (10) on the
19. Position the pump manifold (2) underneath the gear unit
2
20. Attach pump manifold (2) to the gear unit housing. Ensure
1
21. Screw pump manifold (2) tightly to gear unit housing.
9
22. Lubricate O-ring (Fig. 10, Item 6) between pump manifold
3
23. Push connection bend of suction hose into the inlet valve
24. Install front cover.
1
2
facing upward.
1
(6). Screw retainer nut (6) into the pump manifold (2) and
tighten by hand.
packings) for the piston (3) from above onto the piston.
grease.
pump manifold (2) from below. Using a rubber mallet,
lightly tap the piston (3) from below until it can be seen
above the pump manifold.
slider assembly (4).
housing and push up until it rests against the gear unit
housing.
that the pressure sensor does not damage the pressure
sensor seal (10).
(2) and inlet valve housing with machine grease. Screw
inlet valve housing to the pump manifold.
housing (Fig. 10, Item 1) and secure with retaining clip.
Screw on return hose and clamp to suction hose.
REPAIRS AT THE UNIT
19